[INFO] cloning repository https://github.com/YKG/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/YKG/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYKG%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYKG%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d0b05d549483715d226c8935136b12384366646f
[INFO] checking YKG/rust-playground against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYKG%2Frust-playground" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/YKG/rust-playground on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/YKG/rust-playground
[INFO] finished tweaking git repo https://github.com/YKG/rust-playground
[INFO] tweaked toml for git repo https://github.com/YKG/rust-playground written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/YKG/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c9ba70439544178c8e516e3449002b59ff4e233daf712a9b732f0e23bb2f6d6
[INFO] running `Command { std: "docker" "start" "-a" "8c9ba70439544178c8e516e3449002b59ff4e233daf712a9b732f0e23bb2f6d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c9ba70439544178c8e516e3449002b59ff4e233daf712a9b732f0e23bb2f6d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c9ba70439544178c8e516e3449002b59ff4e233daf712a9b732f0e23bb2f6d6", kill_on_drop: false }`
[INFO] [stdout] 8c9ba70439544178c8e516e3449002b59ff4e233daf712a9b732f0e23bb2f6d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34219506b8dfe01695814c619d92c52f7bb6a60692b0b8c9439a0b6f5234413c
[INFO] running `Command { std: "docker" "start" "-a" "34219506b8dfe01695814c619d92c52f7bb6a60692b0b8c9439a0b6f5234413c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]  --> tests/tuple.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let t1 = (1);
[INFO] [stdout]   |              ^ ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 3 -     let t1 = (1);
[INFO] [stdout] 3 +     let t1 = 1;
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]  --> tests/tuple.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let t2 = (2);
[INFO] [stdout]   |              ^ ^
[INFO] [stdout]   |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 4 -     let t2 = (2);
[INFO] [stdout] 4 +     let t2 = 2;
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> tests/tuple.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     /// see test_tuple_cmp
[INFO] [stdout] 27 | |     /// the meaning of the cmp function is:
[INFO] [stdout] 28 | |     /// 1. numbers greater than 3 is greater than those less or equal than 3
[INFO] [stdout] 29 | |     /// 2. for each group(gt3, lte 3), reverse the number orders
[INFO] [stdout]    | |________________________________________________________________^
[INFO] [stdout] 30 |       v.sort_by_key(|&num| (num > 3, Reverse(num)));
[INFO] [stdout]    |       --------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_std_cmp_Reverse` should have a snake case name
[INFO] [stdout]   --> tests/tuple.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn test_std_cmp_Reverse() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_std_cmp_reverse`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "34219506b8dfe01695814c619d92c52f7bb6a60692b0b8c9439a0b6f5234413c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34219506b8dfe01695814c619d92c52f7bb6a60692b0b8c9439a0b6f5234413c", kill_on_drop: false }`
[INFO] [stdout] 34219506b8dfe01695814c619d92c52f7bb6a60692b0b8c9439a0b6f5234413c